The following table represents addition of two six-digit numbers given in the first and the second rows, while sum is given in the third row. In the representation, each of the digits $0,1,2,3,4,5,6,7,8,9$ has been coded with one letter among A,B,C,D,E,F,G,H,I,J,K, with distinct letters representing distinct digits.
| |
|
B |
H |
A |
A |
G |
F |
| + |
|
A |
H |
J |
F |
K |
F |
| |
A |
A |
F |
G |
C |
A |
F |
Which among the digits $4,6,7$ and $8$ cannot be represented by the letter G ________